What does Exodus 9:24 mean?
In the Old Testament, lightning is described with the word berāqim', but it can also be referenced using the term for "fire," which is ēs'. Here, the Hebrew says this "fire" was "flashing," using an expression implying clinging or joining. This means the epic hailstorm sent by God (Exodus 9:23) was a true "storm," not merely a torrent of ice (Exodus 9:28).As predicted, the storm is like nothing the nation of Egypt had ever seen (Exodus 9:18). Hail had fallen there before; even desert climates can experience hailstorms, though they are rare. The Egyptians were a literate people and kept records of past events. The educated among the Egyptians would find nothing in past records to compare with this. That lack of precedent may be why some refused to believe the warning given before the hailstorm occurred (Exodus 9:19–21).
Scripture gives no measurement for these hailstones as in some other passages (Revelation 16:21). But the barrage seems "heavy" both in terms of volume and in the size of the hail. Hailstones can deal severe injuries when they reach the width of an adult's thumb. Even in the middle east, recorded hailstorms have included chunks of ice the size of a hand. At that bulk, or even larger, and in large volumes, this barrage would have pulverized unprotected people, plants, and animals (Exodus 9:25, 31).